This is the Giant 16+ Propel Advanced SL ISP Clamp Spacer Kit. Integrated seatposts are great, but the only drawback is once it is cut, there’s no way to go back. Giant has a solution to add height back to a ISP post on the Propel.
Features:
up to a total of 25mm of added height available
Fits 2016+ Propel ISP models only
ISP spacers stack in between the seat mast and seat clamp to achieve additional seat height
